HP Ipaq h1940 won't sync with Vista

Hi. While holding power button, and pressing reset will do a hard reset to your PDA (reset the device to its factory default settings). So if your PDA is working well, don't do it. As for the syncronization with your Vista PC; Winodws XP uses the ActiveSync software for syncronization, and for Windows Vista, Microsoft developed a brand new syncronization software called "Windows Mobile Device Center". It can be downloaded here: (http://www.microsoft.com/windowsmobile/en-us/help/synchronize/device-center-download.mspx). When you download/install this software to your PC, you should be able to connect your PDA to your PC without any problem, and definitely without changing any OS in your PDA or PC. Hope this helps.