+ 2 Votes I avoid re-install like the plague . . . Who Am I Really Updated - 2 years ago because it's a > 60 hour job and i only do it when absolutely necessary, which is usually - when something breaks badly and can't be repaired simply by restoring the image or - new machines to get rid of the bloat- crap- sponsor-ware also I use a locked up & screwed down configuration that disables as much of the unnecessary crap I don't use eg. - all user files separated from C which is for OS / Programs only - recycle bin = disabled / off via config. and group policy - system restore = disabled / off ^ - user tracking = disabled / off etc. which in turn means that a 7 year old install of XP is still performing nearly as good as it did new and most of the slowdown comes from the AV updates requiring more hardware and not general usage bloat eg. McAfee VSE 8.5 doesn't use as much resources as VSE 8.7 does VSE 8.7 brings a P4 down to a crawl on certain tasks because VSE 8.7 has more components running @ "Process Priority High" than the previous versions my 2007 XP install on a Core2Duo is just as fast as it was out of the box with the only slowdown occurring at boot time (approx. 2+ minutes for boot) whereas a fresh install would boot in less than 30 seconds however, app performance including opening is the same as day one eg. Firefox opens in about 3 seconds mind you, Firefox is configured to store nothing: - no browsing history - no DL history - no cookies etc.