OK, so I've decided to cut down on the number of tests due to the time taken for most of them and the differences being minimal. There is still the Windows 7 Home Premium 32 bit test to carry out but as I intend on using that on the laptop once this is all done that's going to be the last test.

So far, the results are quite surprising to be honest. I just finished the Windows XP test and, well, it wasn't what I expected!..

Windows 7, no updates, no optimisation 66 min (void, appears it may have been under load not idle) Windows 7, no updates, minor optimisation 86 min Windows 7, all updates, minor optimisation 448 min Windows 8, all updates, no optimisation 432 min Windows XP, all updates, no optimisation 162 min

Remember, these will be different for your hardware and battery capacity. My battery capacity actually increased throughout the tests from test 1 being 56358mWh and test 5 being 60621mWh so I will be calculating the discharge rates based on this to give a more accurate comparison.

So, in short, there you have it. Windows XP certainly isn't the more energy efficient OS as was first argued but Windows 7 or Windows 8, once updated with fixes and patches, is miles above the rest.

Use this as you see fit. It is for guidance only.

Over the next few days I'll sort out a guide/tutorial for how to get the most out of your battery and post up results for Windows 7 Home Premium.

I've also updated the draft reports with the 5th test and results.

Made a small mistake it is CCLEANER,been doing computers for a long time,but thanks for advice others may need it AND test i did one mine was much different i see something you forgot Windows XP, all updates, no optimisation 162 min Windows 7, no updates, no optimisation 66 min I would like to see windows7 with updates,no optimisation to match the same test as mine and maybe it your computer,i dont know i only know what i see ON MINE

As stated way back at the beginning of this thread, you either didn't install all patches and updates or you have another problem with the installation/PC. These results back that up. No amount of optimisation would decrease battery drain by the difference between tests 3 and 5.

Based on the information I know about Windows 7 and 8 I would imagine an unoptimised Windows 7 to be around 432min as Windows 8 was, so an increase of 16 minutes through minor optimisation.

It does not matter what test you carried out. The Windows ACPI logs of the discharge of the battery prove my points and give enough information for people to make an informed decision on which OS to choose.

As I will be providing information and tutorials on the optimisation carried out and the inclusion of Windows 8 without optimisation there is no reason to carry out a further test as per your demand.

PLEASE dont tell me i didnt install the patches ,please Like i am, going to say and this whole thread i found using windows xp SAVED ME battery life,if you like WINDOWS 7 so much use it in your robots or if other lkie to use it fine also maybe if i optimisation it it might be better and may be not Also like you said no other tests if needed my my demand,

i see you re-edited your post

would love very much to see one robot design using WINDOWS 7, and i dont meen professional,looking at hobby robot,and not from this forum many many out there with guys like us building so many many robots and more each day and so far none using WINDOWS 7

it's not about what I like, it's about what the test reported back. You cannot justify yourself against the ACPI logs from my tests. You have shown no indication of when you will be providing your results and have said very little on how you come about your opinion.

If you did have an up to date Windows 7 installation then you have some other issue with your PC causing a power drain. My tests clearly show that Windows XP puts a higher demand on the CPU and has a faster battery discharge rate than any other updated OS. I highly suggest you look in to this as it could be flagging up a root kit or other malware which has remained undetected.

Optimisation had very little impact on the battery life which was expected as it was only minor, basic optimisation.

If you wish to ignore these tests and carry on using Windows XP, for whatever reason, then please do so but until you can justify and prove any arguments against these results please refrain from disputing them.

No further discussions will be had on this subject until you can provide adequate logs of your tests, including as a minimum the logs from the advanced configuration and power interface (ACPI)

wll at least this debate will go back and forth and never ends

you said this Just be cautious of what you clean up, especially in the registry and booting, major problems can happen by removing something that is needed. I do not suggest using it unless you know what you are doing.

I think most people know you always back it up first,CCLEANER has that SO YOU CAN UNDO IT second i look at every line in the registery ,before i delete it,and sometimes can get rid of some mareware or ads without using marewarebytes,i alot of it is in the registery and CCLEANER dosent find them

Not going to run most tests ,i build robots and will take time of my building them and my freelance work i do for my job

I did have a friend that live near me until he moved,he knows alot more about windows 7 then you would ever know HE let me see windows 7 prototype ,before the market was selling them,and he was running tests on for a big software company

AND PLEASE dont tell me not dispute them you have your opinions and i have mine ,and we all have a right to what we say

I have my facts (fully justified & proven) of which I am more than qualified to comment on, you have your opinions which have been proven incorrect, are inconsistent and contradict your earlier posts, there is a big difference and I am finding it harder and harder to take you seriously.

And FYI, I've been a member of MSDN for longer than I care to remember, I have multiple Microsoft certifications across many software applications and operating systems and have been an official tester of Microsoft operating systems since Windows XP. Not forgetting the fact I hold VLKs for most Microsoft Operating Systems which, well, look up how you get that privilege. To put it bluntly, you're an idiot if you ignore my advice, especially when it is backed up by hours of testing, over a decade of training and has been certified by the very people who make the software... but of course you know better because you had a friend who showed you RC1...

If you intend to dispute my tests you must be able to back up and justify your outrageous claims. They are not opinions, they are facts based on research and testing with results available to justify them. If you don't know the difference between that and an opinion then you are a bigger idiot than I had thought.

@RichMR2, please continue your tests. Remember there are so many of us following this thread. Try not to beat your head against the wall or get personal. We understand though.