Aero Baisc is using the CPU only, meanwhile the GPU is just sitting there doing nothing. Put the full Aero back on as it is heavily GPU based, then disable transparency if you are worried about battery life. You can also disable Min and Max animations for window resizing, and disable show contents of windows for extra responsiveness. Your computer should run Vista very well, so the problem looks to be software. Do the following: Start > Type in "msconfig". Go to the Startup tab and give us a screenshot. It lists the software that is loaded on startup which usually runs in the background. Also, how many gadgets do you have running in the sidebar? If you don't need them, get rid of them and disable the sidebar. It is a resource hog. Also, you have enough memory. Enable superfetch and prefetch and leave them alone. Indexing you don't need to disable it, you can configure it to index only certain folders like "Documents" or your user folder. This way you get the benefits of indexing with a negligible performance drop.