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I get similar, but worse, errors whenever I cold-boot my laptop (as in temperature-wise). It just hangs at the beginning of the boot, before it enters POST and long before it gets anywhere near Windows. I guess it's a motherboard issue, these days I never let it get cold and it's fine.
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Be careful... a friend of mine left his laptop near the stove and then he called me asking if it was easy to replace his laptop keyboard...
Keys started to double up and the right part of the keyboard became bent. 
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 I don't keep it that warm!
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The best of that it was that it kept working...
It was the cheapest DELL laptop I've seen, but at least it was armored against heat... 
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I've had similar issues if I turn on the laptop and I have a USB stick plugged in - looking for a boot disk?
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Shouldn't be... it also happens after the computer goes sleep after a while of not touching it (i.e. going lunch). 
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Joan M wrote: (i.e. leaving the computer on before going to lunch)
Well, there's the problem - your computer is still out to lunch! 
Marc
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This sounds like the issue one of my laptops has with Win10 (and 8.1 before that) except logging in doesn't cure it. When I researched it, I discovered that the issue was that the video driver doesn't reset correctly, and is a problem that's been with Windows since at least Windows 7 (google for "Windows 7 black death").
One solution (the one I use) is to create a task that automatically runs on boot and resets the video card. There's instructions out there if you what to try that route, but you might have to redo it every time Win10 updates, as I had to redo it after the anniversary update a while back. And as I recall, it requires installing the Windows DDK to get the utility you need to reset the driver.
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xkcd: 4th of July
I welcome your new drone masters... 
If you have an important point to make, don't try to be subtle or clever. Use a pile driver. Hit the point once. Then come back and hit it again. Then hit it a third time - a tremendous whack.
--Winston Churchill
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I thought their drone master had been in power since January 20th?
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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You got that wrong. He just drones on and on...
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He's not a drone master; he's a master drone!
If you have an important point to make, don't try to be subtle or clever. Use a pile driver. Hit the point once. Then come back and hit it again. Then hit it a third time - a tremendous whack.
--Winston Churchill
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He's a complete Master-something, and I suspect putting worms on hooks may be involved...
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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If it looks like a question and it smells like a question, that's because it's most likely a question. And this no exception, except hey at least it's not a programming question and I'm not aware of a math board. To sweeten the deal of posting a question in the lounge though, I promise not to show any pictures of myself oiled up. I think Chris still has scars from that anyway.
But, given $100 and a 25% tax rate. Everyone knows John Doe is paying $25 to Uncle Sam, but how would he go about knowing what a new amount and new tax rate would be needed to get the original amount of $100 again after the new tax rate is taken from the new amount when only the $100 and 25% rate is known? My math know-how is coming up short for this.
Jeremy Falcon
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Does this help? Time Value of Money Calculator
It Is The Absolute Verifiable Truth & Proven Fact
That Your Belly-Button Signature Ties
To Viviparous Mama.
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Nope, not really after time value for this. This is more along the lines of forecasting taxes. Not really compounded interest, etc.
So far I've come up with stuff like 0.8 = ($100 / ($100 * 1.25)) to get a ratio, but something doesn't seem right to have a 20% tax on more money. So I know I'm doing it wrong. I blame old age.
Jeremy Falcon
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Sorry, didn't understand the phrasing of your question correctly. But if you wanted to know the rate that you would need to make the following year to have $100 again at the end without any additions from the $75, it is about 29.5% compounded monthly. 
(This site works: Money calculator: Present and future values - MSN Money. The previous one doesn't!)
It Is The Absolute Verifiable Truth & Proven Fact
That Your Belly-Button Signature Ties
To Viviparous Mama.
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Given a new amount, A, and a new rate, R:
A (1 - R) = 100
A = 100 / (1 - R)
R = 1 - 100 / A
For example, R = 20% gives A = 125.
R = 25% gives A = 133.33333...
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Dude... thank you! Why did I not think of this? Have a virtual ![Beer | [beer]](https://www.codeproject.com/script/Forums/Images/beer.gif) on me.
Jeremy Falcon
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he wants 100, he keeps .75 of his earnings.
SO its 100/.75
Pretty simple and definitely not guru stuff. 
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Thanks for the elegant answer. But be nice...
Jeremy Falcon
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SO think, 'what is 100 three quarters of'
Means you need to break 100 into 3 and add that much to 100.
Just another way of visualising it.
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It's an awesome way of visualizing it. Simple and it works. 
Jeremy Falcon
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As an ex mech-aero engineer I was always taught to guestimate the result, then when you do the exact figures you can check if you are in the ball park. If not, your figures could be wrong, so just getting a feel for the problem, painting a picture in your head, is a good place to start.
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