My computer was hit with a malware problem "Australian Federal Police". Running Windows 7 on 64 bit machine. Caused lockup & reoccurence on reboot. Have gone to previous system restore point & this has got rid of
malware, but now when I boot up the MS Security Client dialog box appears "An error has occurred in the program during instalation. Error code 0x80073b1" I have run various check utilities including Speedy PC Pro & WinZip Registry.
I tried to uninstall MSE but kept on being told could not uninstal because files missing - finally got past that message (not sure how) but when I tried to install from MS Security Client got through to install stage then failed with error 0x80070643.
I have completed the 5 steps in "I can't install MS Security Essentials" & no improvement. I have queried the error codes & taken actions suggested - no use.