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When you boot up and the Date & Time is wrong then you correct the
Date & Time, then when you shut down and boot up again the Date and
Time has changed. This is an indication that the BIOS battery is flat
and you need to replace the BIOS battery. Install a new BIOS battery, go
into the BIOS setting and set the Date & Time etc. and the new
battery will keep your settings stored in the BIOS.
You get this message if your Laptop (CMOS/configuration) Date is really outdated and wrong: check and change your Laptop Configuration setting for Date and Time. Also check your Windows Date/Time. If the date/time you enter is not maintained properly, especially after you switch off the laptop, then you have a bad backup CMOS battery that needs to be replaced.
I think you're trying to get into local (on your PC email) email (probably Microsoft Outlook), whereas the vast majority of the internet-connected use remote email (accessed via your already-functioning browser). Your workaround is to logon to www.hotmail.com, www.gmail.com, or one of any other of the free email sites. This workaround has additional advantages - (1) you needn't maintain/debug your local email software - let the professionals maintain it for you remotely, and (2) by using one of the free email sites, your email/pictures/music storage is held remotely - freeing up valuable laptop disk space for other uses. The disadvantage is that your email is held remotely by a corporate entity, whose idea of privacy may not match your own, and even if it does, their idea of privacy may shift over time, and also may shift when the freebie email system you choose is suddenly acquired by new middle-east owners, flush with oil millions.
It's possible the power cord is defective only giving enough power for a partial boot. I would try another power cord.
If it's not the powercord then it would definitely be the motherboard not taking the power and distributing it correctly and you would have to replace it.
The battery that might be dead is not the main battery. It's the cmos battery, which is a coin cell battery located on the motherborad. It stores the setting in the bios and keeps the date and time accurate. Errors 161 and 163 mean the date and time are wrong. If the cmos battery is dead then, the date and time go back to 1/1/2000 every time the pc is restarted. Thus, you get the "wrong date and time" errors 161 and 163.