thEnd Posted October 9, 2005 Share Posted October 9, 2005 CCleaner Cripples Application Load Times Author: Andrew Recently CCleaner has added an internet urban legend as a cleaning option, "Old Prefetch Data". Cleaning the Prefetch folder is an internet Myth that simply will not die due to the gross ignorance of many people in regards to how Windows XP Prefetching works. These same people generally recommend other bogus advice such as disabling Windows Prefetching completely and adding /Prefetch:1 to desktop shortcuts. "Bottom line: You will NOT improve Windows performance by cleaning out the Prefetch folder. You will, in fact, degrade Windows performance by cleaning out the Prefetch folder." - Source CCleaner for the most part is a good application, it quickly and easily removes temporary and unused files from Windows. It has a nice interface that clearly shows what has been "cleaned". On neglected systems this can free hundreds of Megabytes of harddisk space. Apparently in the authors quest to clean everything and anything, he blindly ignored how Prefetching works. What CCleaner does CCleaner deletes any Prefetch file older then two weeks based on the .pf file's last access date. This is completely idiotic for a number of reasons. First you should never delete a .pf for any installed application. With the .pf file missing, that application will take up to 100% more time to load when you decide to launch it. CCleaner does this to any application you have installed on your computer but have not used in over two weeks. It makes absolutely no sense to delete these files. Why would you deliberately want to slow down any installed application's load time? It will also do this if you have not used you computer for two weeks. Second, it is quite common to disable the NTFS Last Access Time Stamp for performance reasons. I actually recommend doing this since it speeds up the file system. In this case CCleaner will delete any .pf file that was created over two weeks ago. You can clearly see how running CCleaner in this case would wind up deleting ALL your Prefetch files every two weeks. Now you are crippling every application's load time on your system instead of just the ones you have not used in two weeks. Ridiculous! Conclusion Do not clean the prefetch folder! If you use CCleaner uncheck the "Old Prefetch Data" option. Finally let the makers of CCleaner know they need to remove this option from CCleaner. For more information read: Link to comment Share on other sites More sharing options...
Moderators Andavari Posted October 9, 2005 Moderators Share Posted October 9, 2005 MrG the CCleaner author has already given a statement about CCleaner and the cleaning of the Prefetch folder. Therefore those who keep complaining about it, and those who keep quoting the same person over and over need to give up. To stop the bickering, and complaining about the Prefetch "issue" paranoid users can open CCleaner and simple uncheck Old Prefetch Data. Link to comment Share on other sites More sharing options...
Capman Posted October 9, 2005 Share Posted October 9, 2005 To stop the bickering, and complaining about the Prefetch "issue" paranoid users can open CCleaner and simple uncheck Old Prefetch Data. <{POST_SNAPBACK}> If they are lucky enough to have the option, I'm not. Not that it bothers me. Link to comment Share on other sites More sharing options...
Moderators rridgely Posted October 9, 2005 Moderators Share Posted October 9, 2005 That is really weird, it should be right under windows log files. Try a reinstall? Link to comment Share on other sites More sharing options...
Capman Posted October 9, 2005 Share Posted October 9, 2005 Nope, still not there, going to try a totally clean install. Link to comment Share on other sites More sharing options...
Capman Posted October 9, 2005 Share Posted October 9, 2005 Uninstalled it using add/remove, deleted the CCleaner folder from program files, reinstalled, and it is still not there. Link to comment Share on other sites More sharing options...
Moderators rridgely Posted October 9, 2005 Moderators Share Posted October 9, 2005 I havent ever seen an error like this. I wonder what could cause it? Link to comment Share on other sites More sharing options...
Capman Posted October 9, 2005 Share Posted October 9, 2005 Don't know, I am going to install an older version to see if it was there then. I can't remember seeing it for ages. Link to comment Share on other sites More sharing options...
Capman Posted October 9, 2005 Share Posted October 9, 2005 Tried an older version, still no joy, back on the latest version now. BTW, I haven't been editing my posts, just to highlight the fact that I am posting again. Link to comment Share on other sites More sharing options...
Glenn Posted October 10, 2005 Share Posted October 10, 2005 This is probably a dumb question but ... Do you have a Prefetch folder and is Prefetcher enabled? I noticed that CCleaner only seems to offer you Applications it detects. Does it check for Windows components before offering the option? Link to comment Share on other sites More sharing options...
Moderators Andavari Posted October 10, 2005 Moderators Share Posted October 10, 2005 If CCleaner isn't offering the cleaning of Old Prefetch Data I assume it means it can't find this key: Detect=HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\OptimalLayout To rebuild the key if it's missing: Windows Registry Editor Version 5.00[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\OptimalLayout]"LayoutFilePath"="C:\\WINDOWS\\Prefetch\\Layout.ini" Link to comment Share on other sites More sharing options...
Capman Posted October 10, 2005 Share Posted October 10, 2005 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\OptimalLayout]"LayoutFilePath"="C:\\WINDOWS\\Prefetch\\Layout.ini" <{POST_SNAPBACK}> I don't have the above file, so, what do I do now, copy the above code into notepad and save as a .reg file? If so, what do I name it? Link to comment Share on other sites More sharing options...
Tarun Posted October 10, 2005 Share Posted October 10, 2005 I don't have the above file, so, what do I do now, copy the above code into notepad and save as a .reg file? If so, what do I name it? <{POST_SNAPBACK}> Is your Task Scheduler service enabled? Link to comment Share on other sites More sharing options...
Capman Posted October 10, 2005 Share Posted October 10, 2005 Is your Task Scheduler service enabled? <{POST_SNAPBACK}> No, it's disabled. Edit, Just started it and set it to start automatically, and it cured it, Thanks Tarun. Link to comment Share on other sites More sharing options...
Moderators Andavari Posted October 12, 2005 Moderators Share Posted October 12, 2005 I had disabled the Task Scheduler on my previous factory install of WinXP and noticed that Prefetch stopped working, however I had to not only re-enable the Task Scheduler I also had to rebuild the registry entry for Layout.ini. --- Edit 1: Forgot to mention, also to get Prefetch to working again I had to do this: 1. Start->Run: %windir%\system32\Rundll32.exe advapi32.dll,ProcessIdleTasks 2. Restart Windows 3. Defrag hard disk Note: No prompts will show for "%windir%\system32\Rundll32.exe advapi32.dll,ProcessIdleTasks" however the hard disk light will become active. It optimizes an already existing Prefetch data Layout.ini file. It can also rebuild/create a missing Layout.ini file. --- Edit 2: To answer your question CaPMan about the registry file I posted a few posts above. Save it as a .reg file, such as Enable_XP_Prefetch.reg. You'd only need it if re-enabling the Task Scheduler doesn't re-enable Prefetch. However in most cases the .reg file isn't needed at all, however in my situation I had to use it because a registry cleaning program (don't remember which one) had already removed the Layout.ini reference from the registry. Link to comment Share on other sites More sharing options...
Tarun Posted October 12, 2005 Share Posted October 12, 2005 Can also use Windows Prefetch Clean and Control, which is on MajorGeeks. Link to comment Share on other sites More sharing options...
YoKenny1 Posted October 17, 2005 Share Posted October 17, 2005 On my 2.4GHZ ASUSTeK Computer INC. P4S8X-MX Rev 1.xx system with a 80MB 7200RPM hard drive I do not notice any time difference in loading applications without the prefetch entry or with it. Keep your security software up to date by viewing the announcements at Calendar of Updates Link to comment Share on other sites More sharing options...
Moderators rridgely Posted October 17, 2005 Moderators Share Posted October 17, 2005 On my 2.4GHZ ASUSTeK Computer INC. P4S8X-MX Rev 1.xx system with a 80MB 7200RPM hard drive I do not notice any time difference in loading applications without the prefetch entry or with it. <{POST_SNAPBACK}> Thats because it dosent make a differance. Mastertech is a looser with no life and he needed something to argure with people about so he chose this. Everyone else is ignoring him so we should too. Link to comment Share on other sites More sharing options...
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