This is a possible solution Go to My computer
Go to Tools>Folder Options>View.
Uncheck "Launch folder windows in a seperate process".
Reboot and see if this takes care of your problem.
OR
This may give you some breathing space but is probably not the final fix
First try getting a KNOWN GOOD copy of explorer.exe from another / mates computer
boot your to safe mode...find your copy(ies) and RENAME IT/them
copy the known good version in place
try and see what happens...if it works and improves then reboot and DELETE the offending renamed ones
Then get some different defense software if you feel what you have is not up to speed....I find Avast over active but effective and NOD32 as good as any I have tried
Good Luck
Baudy!