Hi Pilletch I have a fix for you from good authority. Do the following
REGEDIT4
[HKEY_CLASSES_ROOT.exe]
@=“exefile”
Merge the above with your registry. Copy the above text no space before the regedit4, no line above. Paste into notepad and save as fix.reg. Then right click the file and merge with your registry.
Then download http://download.bleepingcomputer.com/sUBs/zh/BetaB/combofix.exe to your desktop then go to Start > Run
and paste the following into the box “%userprofile%\desktop\combofix.exe” /wow include the quote marks
On completion paste the combofix log back here