I can tell you your problem without even hearing any more info.
Want to know what it is?
Windows and HP. Two of the worst companies ever.
I can second the HP thing........ as for Windows, it has its issues....but I just stick with what I know.

I look at computers like the computer guys do.....they are disposable goods. When my last desktop crapped out in 2009, money was tighter with a senior in HS (needing a computer replacement fast, to do two online classes)....so I bought one of the cheapest tower systems wal-mart had for $300: a 750 gig eMachines unit with dual processor. It has Win 7 and so far, fills my simple needs (if it makes it to Oct, it'll be five years old).
When it craps it's diaper, I'll probably do the same thing again.
I went back later and bought an 18" flat screen LCD monitor and all is well.
I run a Kodak all-in-one scanner/printer and it has the cheapest ink cartridges as well. Printers have always been my bane in the computer world. The last printer I had was an HP and replacing the two ink cartridges cost about 90% of the price of buying a completely new printer (yep).