I have an HP Windows 7 computer that has been working fine until I attempted to install Chrome Browser. Sometime afterward I noticed that my mouse curser would jump around erratically at times and if I try to left click on something, it doesn't work at all and I might have to wait 30 to 120 seconds for the mouse click to work again. I de-installed Chrome, but the problem continues. My Windows updates are all up to date, with the exception of the optional updates. (I rarely install them because I never can figure out if they're necessary, so being safe rather than guess, I don't install optional updates). This cursor problem has been going on for a few weeks and occasionally my keyboard doesn't seem to print out letters as typed. There seems to be a lag at times, although that's not often. Until the Chrome install, this computer has been perfect. Any assist will be appreciated.