Performance :: Running Abnormally Slow On Lenovo T420
Nov 12, 2015
I am running Windows 10 Pro for almost 2 months now on my Lenovo T420 laptop. It's been running great until a couple of weeks ago where it dived bigtime in performance. I suspected it was a new 3rd party battery (had been running great for a couple of weeks as well), which was the problem. The battery did indeed have a problem and without AC power, the laptop would at last not even start. I took the battery out completely and started the laptop on pure AC power and it worked great for another week. Now, I have the problem again.
Main symptoms:
- IO 4x less than usual
- Slow reaction on the entire system
- Applications open and perform very poor and slow
- Windows search never opens for example "dxdiag", I have to run this through the "Run" application.
It's running super slow, IO's is 4x of the normal (see attachments). Random IOps have dropped a lot while sequential read/writes is still the same... Task manager is nowhere near busy and I've tried to disable the page file completely. I do have Symantec AV but this is not affecting the performance at all. Tried to run DISM to check for index corruption, all fine. I also suspected the SATA controller (SSD is not bad since I have tested with another one as well, same result) and tried to update the driver, but to no avail.
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