My Lenovo thinkpad t61 keeps lagging and skipping at first ibtaught it was the Ram I removed one of them then the system came back, then later started the same thing started again. I later upgraded the ram but still same problem. Please help .
That model came out over 10 years ago so it may just be showing it's age. Software is getting more demanding as time goes on.
It cold also be that your Windows operating system has just gotten bloated over the years. One thing you could try is to restore the laptop to it's "Factory Default Settings" and see if that makes a difference.