First of all, I don't recommend you to use the fully desktop version of Skype at this point. Using Firefox with Skype plugin is a gajillion times more safe.
If you don't want to switch to web.skype.com, then run into Skype settings, and change some stuff:
privacy-> privacy settings:
- only allow calls from your partnerlist
- disable automatic videocall acceptance
- set only allow messages from partnerlist
- disable all 3 checkboxes
- optionally delete skype cookies
call-> call settings:
expand settings with "detailed settings" button
- uncheck all checkboxes
- set call acceptance to from partnerlist only
text messages (the one below "call")-> message-exchange options:
click on "detailed settings" button
- set file save location to "always ask"
- only allow messages from partnerlist
special-> advanced settings:
- disable that M$ tracking thingy checkbox
special-> connection:
- disable all checkboxes
Save, and restart Skype.
After that
(sadly) you'll need to open (*gulp*) Internet Explorer at
ESET's Online Scanner, or just download the installer exe, both does the same, and perform a scan with the following settings:
- Enable detection of unwanted apps
- Enable detection of potentially unsafe apps
- Enable detection of suspicious apps
- Scan archives
- Enable Anti-Stealth
- Disable auto-clean threats
And do a scan.
Note: I'm not advertising, I'm trying to help.
While the scanning is going, acquire yourself a
Process Explorer, a taskmanager on steroids. It's much more easier to spot the infected process in that, because it can categorize the processes, so you can spot any out-of-place process names.
If you -for some reason- can't kill the process with it (like the system BSoDs, or access violation), then report that, because I have solutions for those too
I hope I didn't miss some obvious stuff
