I was able to repair it myself
The issue was that a piece of c**p malware had changed permissions on the c: drive to prevent any installations. I went into safe mode as administator, went to c: properties/ security, Advanced tab, Owner tab and took ownership as admin including subfolders check box.
back in regular boot to owners profile and avg installed correctly. will now scan with avg and malwarebytes.
good luck to you :undecided: