early this afternoon I updated Malwarebytes,and this came up on my scan: Malwarebytes' Anti-Malware 1.33 Database version: 1709 Windows 5.1.2600 Service Pack 3 1/30/2009 1:55:36 PM mbam-log-2009-01-30 (13-55-25).txt Scan type: Quick Scan Objects scanned: 46689 Time elapsed: 1 minute(s), 40 second(s) Memory Processes Infected: 0 Memory Modules Infected: 0 Registry Keys Infected: 0 Registry Values Infected: 0 Registry Data Items Infected: 0 Folders Infected: 0 Files Infected: 1 Memory Processes Infected: (No malicious items detected) Memory Modules Infected: (No malicious items detected) Registry Keys Infected: (No malicious items detected) Registry Values Infected: (No malicious items detected) Registry Data Items Infected: (No malicious items detected) Folders Infected: (No malicious items detected) Files Infected: C:\WINDOWS\system32\drivers\beep.sys (Trojan.Patched) -> No action taken. Becasue of the location of the file,I was afraid to quarantine it without advise, so I had to leave for awhile,and after my return,I updated Malwarebytes,and re-ran the scan,with nothing found: Malwarebytes' Anti-Malware 1.33 Database version: 1710 Windows 5.1.2600 Service Pack 3 1/30/2009 4:37:16 PM mbam-log-2009-01-30 (16-37-16).txt Scan type: Quick Scan Objects scanned: 46822 Time elapsed: 33 second(s) Memory Processes Infected: 0 Memory Modules Infected: 0 Registry Keys Infected: 0 Registry Values Infected: 0 Registry Data Items Infected: 0 Folders Infected: 0 Files Infected: 0 Memory Processes Infected: (No malicious items detected) Memory Modules Infected: (No malicious items detected) Registry Keys Infected: (No malicious items detected) Registry Values Infected: (No malicious items detected) Registry Data Items Infected: (No malicious items detected) Folders Infected: (No malicious items detected) Files Infected: (No malicious items detected) Was this a false positive corrected by update,or has the malware hidden itself? thank you