I kinda have the same problem with JAN SPRONK.
I have an Acer Aspire One D250 Netbook. It worked well the first time I bought it. However, I tried installing programs like ESET Nod32 antivirus, google chrome, bitcomet and I have also uninstalled some programs using CCleaner. The Netbook then asked to have the laptop restarted so that changes can be made completely. I restarted it as requested, however, after a few minutes of starting it up it freezes. The mouse pointer can be moved however, icons and the start button are not clickable anymore. I tried to have it stayed for a few more minutes, considering that the reason might be because it's still on the process of starting up. But nothing took place. I have also tried restarting it all over again but still nothing took place. What's worst is i'm turning off my laptop improperly. I badly need help on this one, if you guys could help me restore my laptop's life the soonest possible, I'd gladly appreciate it!