http://www.howtofixcomputers.com/bb/ftopic140408.h tmlDownload GetOpenClipboardWindow.zip from here:
http://windowsxp.mvps.org/temp/GetOpenClipboardWin dow.zip
Unzip and run the tool. Post back what it reports. For best results, run
this utility during the time you encounter the Copy<=>Paste problem.
Jako poslední možnost se to asi dá zkusit.