My windows 8 unactivated about 3 weeks ago. I'm still using it like normal, the only annoying thing is the watermark. How long can run unactivated windows 8 before it locks me out?
If it's 8 vanilla (not 8.1) just use the MTK to activate it and you won't even have a watermark to worry about.
Windows 8 can be unactivated 30 days. After that, you need activate. You have two methods: 1. Activate on standard method (if you have activation key). 2. Or use Microsoft Toolkit for activate.