I'm having an odd issue that started about two weeks ago, almost certainly right after update "Security Update for Internet Explorer 7 in Windows Vista (KB960714)". It is possible that this update may not be the culprit, however. In essence, whenever I scroll with the mouse wheel while on a webpage using IE7, I get very frequent abrupt jumps (up, down, up/down or down/up) of more lines than currently set (3). I have the same problem using a few other applications, including Explorer. Clearly this sucks eggs, as my mouse scroll was rock solid just two weeks ago and I was about to prepare a backup of my entire drive. It's infuriating to scroll down while reading something and then the page jerks around, losing one's place for several seconds. All the time... :crap:crap:crap This is what I've done: a) Updated driver (Windows told me that my driver was already up to date though). b) Checked to see if "smooth scroll" was still enabled (it was). c) Disabled "smooth scroll" (no effect vis-a-vis solving the problem). d) Reset the advanced options in "Internet Properties > Advanced" (a redundancy, in view that everything was already set to default anyway). e) Tried three different mice (no difference). f) Performed a full scan with Norton Internet Security (result: negative). g) Performed a full scan using Windows Defender (result: negative). h) Performed a full scan using Spybot - Search & Destroy (result: negative). i) Read a thousand posts from a thousand websites regarding issues similar to mine but found no useful information, other than realizing than a thousand people are having "jump" problems with their mice in conjunction with IE7. This seems to be an ongoing problem, albeit manifesting itself in many different guises and under many different circumstances. I'm using a simple "generic" mouse, so it uses no dedicated software. The other mice I tried were also generic (Toshiba and IBM). They are, of course, USB Cord types, not wireless, and two of them were brand new. One of those new ones behaved even worse than my customary mouse. All of them are optical. I use: Toshiba A300 Laptop Intel Core2 Duo T8100 @ 2.10GHz x 2 3GB RAM Vista Home Premium SP1 32-bit It's only five months old and has not left my desk since I purchased it... If someone can help me out with this annoying problem, I would be really grateful. Thanx.