I have Bitdefender Windows 8 Security (64 bit) but it had been installed when this problem started.
Yes, ones I founded how to enable the F8 key for safe mode and did.
As mentioned I can't open elevated cmd (either from the main panel or by Xin+X keys), nor can I start any other program as admin. I could make a restore point but haven't tried to actually restore. I'm gonna check this and the other points.
Yes Sir, this is the right track. Yet, I don't know how far to go.
Malwarebytes found two dozen objects, the quilty ones must be included. On the other hand, I have some programs from the net which may be included too, though are harmless; I certainly have them longer than the start of this problem and would like to keep. Is there any way in Malwarebytes to look up the date of infection? Or find out somehow which are which?
Bitdefender might not live up to its reputation? What are the best shields, what do you have?
As to safe mode, I'm sorry if I still wasn't clear enough. I found and followed the above mentioned tutorial in May. Ever since I can start Windows 8 in safe mode just like Windows 7. Hopefully this is for some benefit to you too.
I tried it whan you said, I couldn't create any new account.
Now, having deleted a few of Malwarebytes catch, I'm gonna attempt it again.
Nothing's changed. When I try to add a new user, first an email address is asked for, the next screen says 'please wait'. I waited about ten minutes yesterday as well as now, then gave it up.
I noticed at one of the malware items the name of a program that I downloaded over half a year ago. This is certainly not guilty now, but probably not legal either.