Question 1

Why does my computer clock keep going wrong?

Accepted Answer

Several distinct causes produce the same symptom, and they are distinguishable by **how** the clock is wrong.

**If it loses time only when switched off**, or resets to a date decades ago, the **CMOS battery** has failed. This is a small coin cell on the motherboard powering the real-time clock and BIOS settings while the machine is unpowered. They last years and then stop. Symptoms include the BIOS reporting settings lost, boot order resetting, and — commonly — **websites refusing to load with certificate errors**, because certificate validity is checked against the system date. Replacement is cheap and usually straightforward.

**If it drifts gradually by minutes**, **time synchronisation** is failing. Computers keep time with an inexpensive crystal oscillator that drifts measurably. Systems correct this by contacting a time server using **NTP** — but synchronisation can be blocked by a firewall, pointed at an unreachable server, or have the service disabled. Check the time settings and force a sync manually.

**If it is exactly one hour out**, the **time zone or daylight saving** setting is wrong, or the region does not observe DST as configured.

**If it is exactly some whole number of hours out on a dual-boot machine**, this is a well-known conflict. **Windows treats the hardware clock as local time; Linux and macOS treat it as UTC.** Each corrects the other's setting on boot, so the clock shifts every time you switch. The fix is configuring one of them to match — usually setting Linux to use local time, or Windows to use UTC via a registry change.

**If it is wrong in a virtual machine**, host suspension and resumption commonly disrupts guest timekeeping; guest additions or tools usually resolve it.

**Why accuracy matters beyond convenience:** certificate validation, two-factor authentication codes, scheduled tasks, log correlation and file synchronisation all depend on it, and a wrong clock produces confusing failures far from the apparent cause.

Question 2

Why does my calendar invite show the wrong time?

Accepted Answer

Almost always a time zone problem — and the specific mechanism determines whether the fault is yours, the sender's, or the software's. How calendar events store time. A well-formed event stores a

Question 3

Why does my computer randomly restart?

Accepted Answer

Random restarts — as distinct from freezes or shutdowns — almost always mean something triggered a protective cut, and the causes fall into a short list you can work through systematically. Heat. The

Question 4

Why is my two-factor authentication code not working?

Accepted Answer

Almost always a clock problem — authenticator codes are generated from the current time, so a device whose clock has drifted produces codes the server rejects, and nothing about the account is wrong.

Question 5

Is it worth repairing a computer or replacing it?

Accepted Answer

Repair is worth it far more often than people assume — because the components that usually fail are cheap and replaceable, and the performance problems that prompt replacement are frequently fixable

Question 6

Why does my computer work fine in safe mode?

Accepted Answer

Because safe mode starts the system with the minimum required to run — and if the problem disappears, the cause is something in what was excluded. What safe mode does not load: Third-party drivers.

Question 7

How do I troubleshoot common errors I encounter during use?

Accepted Answer

Troubleshooting common errors involves identifying the issue, checking basic settings, rebooting the device, and consulting resources. This systematic approach helps resolve problems effectively and enhances user experience.

Related Questions