#Mouse jumping windows 7 desktop serial#

Note: setting the “start” subkey value to 4 will disable windows from looking for serial mice at startup Double click on the “start” subkey and modify the value of the key to: 4 and click the OK button to return to the registry editor window.On the right hand side of the registry editor window you should find subkey named: start.Navigate to the registry key named: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicessermouse.

In the search box, type in: regedit and press the enter key on your keyboard.Then, you can restore the registry if a problem occurs.įor more information view the Microsoft Windows help article titled Back up the registry: For added protection, back up the registry before you modify it. Therefore, make sure that you follow these steps carefully. However, serious problems might occur if you modify the registry incorrectly.

#Mouse jumping windows 7 desktop how to#

Important: The instructions below contain steps that tell you how to modify the registry. Disabling Serial Mouse Detection at Boot Time in Windows 7 The way to accomplish this will be different depending on which version of Windows you are running. The third way to resolve the problem is to modify some settings in Windows so that it does not search for serial mice on the COM ports at boot time. The second way to deal with the problem is to see if there is a way that you can configure the device that you have connected to the COM port to not transmit data continuously and instead only transmit data when prompted with a command or perhaps when a button is pressed on the device. After Windows has booted, you can then turn the device on or reconnect it to the PC and everything should work fine. The first is to either make sure that the device connected to the COM port is turned off (or is disconnected from the PC) when you boot the PC. There are three ways to deal with this problem. Therefore, if you have one of these devices connected to your PC when you boot the PC, you could run into this problem. Many RS232 serial devices including scales, GPS receivers and some measuring instruments are designed to transmit continuous data out a serial port. The consequences of this are that the COM port becomes unavailable to any other program and also, any data received through the COM port could potentially be interpreted as mouse movements and clicks causing your PC’s mouse cursor to jump erratically and uncontrollably.

#Mouse jumping windows 7 desktop driver#

If Windows sees data coming in a COM port at boot time, it loads a mouse driver for that COM port. The way that it does this is to look for any data at all coming in the serial port at boot time. Problem: Since the release of Windows XP and NT, whenever Windows boots up, it searches for a serial mouse on any built in COM ports on your PC.