Photoshop :: CS4, Restarting PC

I'm having a really strange problem with Photoshop CS4 on my Laptop. If my Laptop was recently booted and I start Photoshop everything is fine. If I'm working for a while, suddenly nothing works anymore. Or maybe I should say: It works but only if I'm trying it like 10 times.For example I'm trying to open a file. I click "Open.::" choose the file, double click it, nothing happens. Repeating that won't help too. Only if I'm repeating it again and again it will open sometime. (There is no exact count that I need to reach repeating that steps. Sometimes it works after 3 times, sometimes much later).That happens with everything in Photoshop. If a file is still open and im using the brush tool to create a line or something, I click somewhere in the image, keeping my mousebutton pressed, move the mouse to somewhere else (to create a line/whatever), release the mousebutton and the line disappears. Nothing happened. Now if I'm repeating that again and again, there will be a line anytime. Now nothing helps to get that problem away but restarting my PC. After booting it again everything works fine again, but restarting it again and again isn't really a solution to my problem. The specs of my laptop:CPU: Intel Pentium M 1,86GhzRam: 1 GB RamGraphics: Mobile Intel 915GM Don't know about the rest, but that shouldn't matter anyways. The only thing I could think of is that my Laptops components are too bad, but theyre pretty much exactly matching the requirements.