The latest versions of Ccleaner, Defraggler and Speccy are failing to install for the first time ever for me. I have followed all advice listed on the site but to no avail, they just hang as it begins installation. I am using Windows XP sp3 1 gig ram 80 gig HD with 60 gigs available and have never had a problem like this with Piriform products before. All other programs update smoothly, there is no spyware or malware on my computer. HELP