I tried running checkdisk again from a command prompt as Administrator after booting to Safe Mode. Based on a suggestion at the Microsoft website, however, I then tried to run checkdisk /r or /f at bootup, but that did not launch, despite scheduling it to do so. I opted to do a scan anyway, and it reported that no errors were found. It reported than no scan was needed because Windows did not find any errors on the drive. Next I ran checkdisk on the C: drive, from within Windows (using the simple method in Win 8 of right-clicking the C: drive in File Explorer > Properties >Tools>Error Checking). I ran a hard drive utility (S.M.A.R.T) to check the 1TB internal HD, and no problems were reported. I ran MemTest86 (overnight) to check the 6GB of system RAM, and it tested OK.
I did not run a full antivirus scan with Avast at that point, since the computer was running so slowly it was only approximately 1% complete after about 10 hours, so I was forced to abort the scan to consider other troubleshooting. I ran fresh scans of Avast (quick-scan, not full hard-drive file scan), Malwarebytes, and SUPERAntispyware, and all reported no infected files found. were all previously installed, regularly updated, seemed to be running normally, and had not reported any problems. I could not initially determine whether the slowdown was malware-related or due to failing hardware, damaged or corrupted drivers, Windows system files, etc.Īvast Free Antivius 2014, Malwarebytes Anti-Malware Free, v.
That was the first time this computer (about 15 months old) had ever had any problem. Not merely Internet or programs were slowed, but also boot-up, the appearance of the User login screen, and even the response on screen to entry of user password (which could take several minutes to show up after it was typed). This computer sudenly began to run extremely slowly about 10 days ago, and got progressively worse. Windows Firewall is installed and active. 32.0.1 (latest, with NoScript 2.6.8.41, Adblock Plus 2.6.4, Bitdefender 0.9.9.142, and Hotspot Shield Extension 3.42 security add-ons). Installed browsers are Internet Explorer (disabled as the default, and with highest security settings, and used only to access itself), and Firefox, v. I need some help debugging a Lenovo Ideapad Z585 laptop, running Windows 8.1, 64-bit.
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