On this Windows 7 PC, anywhere within the system that utilizes either a scrollbar or a dropdown menu is unusable. Scroll down in notepad and it zips right back to the top when released. Dropdown menus will choose the top entry even after you have highlighted your choice. When printing, the dropdown menu to choose the printer will always go back to the top entry. Notepad, scroll down to read further down on the page and when you let go of the scrollbar it goe directly back to the top. Has anyone ever seen this before? How do I correct this issue?

I suggest you troubleshoot in Clean Boot Mode. How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7 http://support.microsoft.com/kb/929135 If the issue occurs in Clean Boot Mode, you may use ShellExView. http://www.snapfiles.com/get/shellexview.html Important Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information. Run ShellExView, in the pane sort the entries with manufacturers. Disable all non-Microsoft *.dll files, and check the result. If the issue does not occur, one of the files can be the culprit. We could narrow down it one by one.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

As it turns out; the wireless USB mouse was causing the issue. The batteries had run all the way down and it was necessary to replace them. It was just after replacing the batteries that the issue began. When the mouse was unplugged, the issue with the scrollbars and dropdown menus was no longer in affect. Thanks for your attempted assistance.