Check this setting:
Control Panel > Mouse > Pointer Options tab > Automatically move pointer...
If it's enabled, test with it disabled.
Also, I suggest a system restart if you haven't just done one.
<p>Check this setting:</p><p>Control Panel &gt; Mouse &gt;&nbsp; Pointer Options tab &gt; Automatically move pointer...</p><p>If it's enabled, test with it disabled.&nbsp;&nbsp;</p><p>Also, I suggest a system restart if you haven't just done one. </p><p>&nbsp;</p>