Is your Vista 32 or 64 bit?
I read all the discussions on these forums, and read how everybody was bashing Vista, how it was slow and was incompatible, but I haven't had any of these problems, any issues I suggest downloading Windows Live OneCare Safety Scanner and doing an overnight full scan and that will fix any issue with registy and speed. Also the beta for SP1 is availible and I tried it on a computer that was having problems and it was like a new machine, faster file transfers, better energy efficiency, and it was on Vista Basic, which was really bad. I run Home Premium and have no issues at present, but will let you know if I do.
Also Windows Defender if it finds Spyware will tell you to download Malware Crush, it is a trojan file, so don't download it if you value your computer and thankfully AVG found it, I had a desktop running XP and a trojan activated and the computer's hard drive was corrupted and I had to trash it and buy my Vista Home Premium Dell laptop and am happier with it than I was with XP, honestly I liked Windows Me and 98SE better than XP.

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