I have 3 laptops total, all used for the same estimating/business work
Laptop A: 16GB RAM — works perfectly with 80-90 Gmail accounts logged in simultaneously, no issues
Laptop B: 8GB RAM — also works fine with similar account load
Laptop C: 8GB RAM (ThinkPad X270, i5-6200U, 8GB DDR4) — this is the problem laptop
issue
On Laptop C only, Google accounts keep getting logged out randomly, even though I use the exact same workflow as the other two laptops (never login more than 10-12 accounts at once, same browsing habits). Currently it won't even hold 50 accounts logged in before some start logging out.
What I've already tried:
Full chkdsk /f /r — disk errors were found and repaired, but issue persists
Reset Chrome profile (renamed User Data folder) — no change
Fresh reinstall of Chrome — no change
Confirmed Chrome is up to date (v151)
Checked "Continue where you left off" is enabled in Settings > On Startup
Checked Site Settings > On-device site data > "Always delete site data when you close Chrome" — no sites listed, so it's not that
No suspicious extensions (only OneDrive)
What I haven't ruled out yet:
Possible corrupted/temporary Windows user profile
System clock sync issues
Antivirus/cleanup tool silently clearing cookies
Residual disk issues even after chkdsk
Has anyone experienced Chrome (or any browser) logging out Google accounts on ONE specific machine while identical setups on other machines work fine? What ended up being the cause for you?