Graphics or trackpad/ touchscreen driver. provide the exaxct model name or its specs and we may be able to provide further tips. also state, what version of AE.
After Effects CS5. on Windows 7, 64 bit, processor intel Core i7 1,6 ghz ,
RAM 4gb, No pen or Touch input,
graphic card ATI display adapter (0x68C0), ATI Adapter RAM 1.00 GB (1,073,741,824 bytes)
Installed Drivers atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,a titmm64.dll
Driver Version 8.680.0.0
I hope that will help for futher information..thanks
Do you by any chance have a secondary output configured on your notebook? If so, i would try to turn that off. Also make sure the display is running at its native full resolution. Otherwise the specs look just fine. I would really suspect that you are seeing an issue where some hardware scaling to squeeze everything on the screen is involved. This could eitehr be AE mistaking the secondary output for the primary and vice versa or the default config of the notebook being that way...