What does this mean?

CCleaner for Windows CCleaner Windows Suggestions
1

image.thumb.png.590797a493eb5c4665fe6e90465a142c.png

2

There could be a couple of reasons for that expiry date showing.

First see here regarding an expiry date of 1/1/1970 showing for a licence that has been disabled:

On 19/10/2022 at 12:28, Dave CCleaner said: 
<div class="ipsQuote_contents ipsClearfix" data-gramm="false">
	<p>
		Expiry dates of 1/1/2000 or 1/1/1970 are "NULL" values for licences that have been disabled - generally because you either:
	</p>

	<ul>
		<li>
			requested a refund - in which case naturally your licence will no longer work
		</li>
		<li>
			the licence has been replaced with a newer one - in which case you should use the newer licence that you have received
		</li>
		<li>
			the licence has been expired for a long time - we periodically purge the registration information of lapsed customers from our system
		</li>
		<li>
			the licence was identified as having been pirated - can often arise if the licence was acquired at a surprisingly cheap price from a third party
		</li>
	</ul>

	<p>
		If you believe that none of these apply to you, the best course of action is to email the support team at support@ccleaner.com.
	</p>
</div>

However I think that would still show you 1st January 1970. 

(Although maybe it <em>would</em> show 31st Dec 1969 in the Western Hemisphere, I'm not sure about that*).

Another reason why December 31st 1969 can start showing up anywhere on a computer can be because that computers clock is wrong.*

Check and reset your computers Time and Date.

If your computer keeps losing the currrent time then that's probably because the CMOS battery need to be replaced. 

That's a small button type battery on your motherboard, among other things it keeps the system clock running when your computer is powered off.


A CMOS battery can last years, but will eventually need replacing.


<a href="https://www.pcworld.com/article/2072879/to-test-and-change-the-cmos-battery-of-the-mainboard.html" ipsnoembed="true" rel="external nofollow" target="_blank">https://www.pcworld.com/article/2072879/to-test-and-change-the-cmos-battery-of-the-mainboard.html</a>

*Why 31st December 1969? 

December 31st 1969 is simply the "Unix Epoch Date" that was chosen in 1971 as being 'The begining of computer time' for all modern computing.


Actually the chosen 'begining of computer time' was <strong>00:00 UTC/GMT on 1st Jan 1970</strong> - but if you are somewhere West of the UK and East of the International Date Line, ie the Americas, when it's 1 Jan in the UK you are still on 31st Dec until you catch up at your local midnight.