Problems with pc

Problems never end. I got a problem with my hp laserjet 1018 printer. When I try to install it in my NEC Powermate computer when it asks to plug the printer the pc recognizes a new hardware, but it shows it as an unknown device and doesn`t finish installing. Then I find the printer in Printers window but when I try to print a test page it doesn`t print.
I`ve gone to Device manager and it shows a usb hub controller with an exlamation mark inside a yellow circle. I try to update it with Windows updates but it doesn`t. A pop up window comes out that says: A function driver is not properly installed..... D I have tried to install the driver of the printer in different ways but nothing happens. Always the same problem. I installed the printer in another hp computer and it was installed successfully while in another Nec computer it was the same problem. Can anyone help me pls ???


After some trials I wanted to open a word document to edit sth in it. It opened correctly but while trying to edit it the pc was blocked. I restarted and tried again but after 2 or 3 minutes of fine work it went blocked again. Again restarted and again 2-3minutes it works fine and after that it blocks. I tried this for a couple of times and always the same thing. It starts normally, for the first 2 or 3 minutes It works good enough and then it is blocked and nothing repairs it but restarting. HELP pls ???? What might have gone wrong?
Is sth caused because of the problem with the printer? Sth related with viruses? Or a harddisk degration????
Does formating pc repaires the problem????

 

I have Windows 2000 sp4...