Hi Forum,
I also have a Canon Lide60 scanner with much the same symptoms as above. However, I have 2PC's: A P4 desktop and a IBM t40 laptop. On the latter, the scanner works perfectly, even without any software update. On the desktop - nothing. And I have tried everything thinkable along the lines described above:
Updating software - making sure that no other old TWAIN drivers are present - disconnection all other USB equipment - uninstalling USB root hubs - using USB 2.0 and 1.1 - measuring that the consumption from the scanner are well below 500mA - and so on and so forth.
One - maybe important - difference: When the scanner is connected to the laptop, it makes a small mechanical noise, whereas on the desktop - nothing. On both computers, WinXP home detects the scanner OK, and device manager shows no irregularities. So it seems, that the scanner is unable to detect that it is connected, but WinXP thinks it is. But when trying to scan the above mentioned TWAIN error message that the scanner is not connected appears.
I have tried CANON support, but so far no luck.
Any suggestions to resolve this will be much appreciated!!!
Hans-Henrik