Every time I scan with Avast 4.6 home edition I get the following error message in the error log file:
System 1352 AAVM - scanning error:x_AavmCheckFileDirectEx:avfilesScanReal of C:\Documents and Settings\RayRing\LocalSettings\Temp~WRF0001.tmp failed 0000477.
You can browse Links on my signature for auto-cleaners applications.
You can go there with Windows Explorer and manual delete them.
For Internet cache, go to Internet explorer >Tools > Internet options > Delete files > Click delete all offline content (just to be sure) > click ok. It might take some time to delete them.
Schedule a boot time scan?
Read the help file ;D
Start avast! > Right click the skin > Schedule a boot-time scanning > Select for scanning archives > Boot.