406 infected files in virus chest should i delete?

Hello everyone,
When i was online yesterday I clicked on a craigslist ad’s link and a trojan was found according to avast. I deleted the temporary file since i wasn’t allowed to move it to the chest (it was a J.S Redirector-B[trj] and in C:\documents and settings\debbie\local settings\temporary internet files\content.IE5\X5T331G8\style[2].css) and performed a boot time scan and it said 46 files were infected. Then when i did a standard scan with avast it said over 11,000 files were infected but when i checked the avast infected files list i have 406 files and in all chest files i have 411. I noticed after i did the 2 scans my memory space went down significantly on my “C” hard drive from 202GB to 198 GB. Should i delete all of those files, some, or none and from the “virus chest” or the “all chest files”? I have Windows XP professional and 2 drives on my computer, a “D” drive which was from my old computer inside of it and the “C” drive which was infected yesterday. Both are infected. I have mostly win32:spyware-gen[trj]. Here are the main examples of the infected files since putting all 406 would be too much:

60832520.exe locared in D:\program files\czo8v9uc
win32:adware- gen[adw]

wintB.cab.vir located in C:\program files\alwil software\avast4\data\mov…
win32:adan-025[adw]

wsup.exe located in D:\documents and settings\all users\application data\aol\user profiles\all users\antispyware\dat\quarantine\2005121521393…
win32:spyware-gen[trj]
it can’t be restored it says for this one

~16967.tmp located in D:\documents and settings\barbara\local settings\T…
win32:wintool-B[trj]

Should i delete them or will i cause damage to my windows xp professional file? What should i do with all those files?

If you can wait a little, let the files in Chest, rescan them in a day or two or a little more, delete only the infected ones.
Could have some false positives among them… specially due to gen (generic) detection.
You can delete temporary files and system restore ones that were sent to Chest.