Hi,
all this doesn’t really look suspicious…
can you do a scan in SafeMode (F8-Boot) ?
- Set WinExplorer to show all folders/files, even system/hidden ones…; also all extensions…
- Empty Temp-Int-Files via IE-Extras internetoptions - delte files & check OFFLINE files
- empty all TEMP-folders, via driveCleanup and manually
- empty your JAVA-Cache via COntrolPanel-JavaPlugin-Cache → empty…
please post a hijackthis-Logfile:
http://hjt.klaffke.de/en &
http://www.tomcoyote.com/hjt
Trey Onlinescanner Trend & KAV (see below; pause avast Shield for this; use IE with activeX enabled
More Info: Google or board-search 
Oh yes…
expand the columns in the avast scan report/log by dragging the title bars with the mouse… and tell WHY the stuff couln’t be scanned…