I have an older Windows 7 64B PC. which I did a clean install of the O.S. and all updates are current. I did the OS install a few months ago. It has a Pentium D 3.00GHZ processor, 8 GB ram, 650MB WD hard drive, NVidia Geforce 8300 graphics. Nothing special but it is a slow performing dog. I have disabled so many services which has not helped. All I want to use this for is general web browsing and youtube videos which are practically useless. Processor load is always at 100% doing even the most basic things and is noticibly slower than a couple old XP pentium 4 pc's I have. For some reason when I check in system properties, 8 GB of memory is shown but only 3.5GB is usable memory. I would appreciate any hacks or changes in settings which might help this under performing PC.