Hi, I used the steam feature under multimedia and had the same issue, firstly I went to the store to verify and found everything was white with links, so I right clicked and hit refresh, this got the "shape" of things back however some pictures were still missing as displayed here:
furthermore after searching google "ccleaner bugging steam" I was able to find this topic available on steam forums: http://forums.steampowered.com/forums/showthread.php?p=21594606
scroll down to the username afarnsworth who works for valve and references a fix that worked for another user with the same issue.
( This is easily fixed by deleting the cache folders.
1. Exit Steam
2. Navigate to: X:\Program Files (x86)\Steam\config
3. Delete the "htmlcache" and "overlayhtmlcache" folders
4. Start Steam )
Here's my results for recreating this issue, I have used CCleaner while steam is launched and have had all of the bugs reported above, after repairing them by following the instructions above I decided to try cleaning with steam CLOSED completely and I am unable to recreate this bug, I can assume that this issue would be the very same if a user were to delete these folders and or files that CCleaner cleans while steam is running, IMO the only thing CCleaner needs to do is enforce a DO NOT CLEAN IF RUNNING policy on steam. I however cannot speak for everyone but my testing leads me to believe that at least on windows 7 64bit that this isn't an issue when steam is exited completely out, be it for cleansing of it's caches or otherwise. I hope that you find this information use full in ruling out this issue, I believe anyone can recreate this issue if they leave steam running when they launch CCleaner and have Steam under multimedia in the application tab checked. Thanks for reading - MayJoko
