Once my PC has started up - eventually, I noticed that it was running a process which wouldn't allow me to perform any functions whilst this was going on. On checking the Task Manager, I noticed that a process labelled 'wuauclt.exe -SYSTEM' was using a lot of memory doing whatever it was doing. This could go on for around twenty minutes until it eventually settles down and I was able to use the PC with no further problems.
I know that there is a trojan of this name, but I am concerned that this may be a legitimate system file which I would not want to remove.
Any help would be greatly appreciated as this is driving me nuts