How often do you reformat/reinstall O.S.?

[smokey032]

formatting once a year, has become routine for me
all data on separate drive and weekly image back ups

[boobhunter]

Never done it since upgrading to SSD

[c138nr38]

Windows: twice a year

Linux - till it dies ( never ? ;-)

OSX - i like to renew the startup-drive every 2 years ( HW-speed-cycle)

[Cov]

Windows 10 build 18305 comes with a sandbox, ain't that a cool feature?

[Q91]

Up until about 2012 I would reinstall Windows every 8 or 9 months or so, because computers tend to get much slower before that point. From 2012, I haven't "reinstalled" perse. I have changed hardware, upgraded from Windows 7 to Windows 10 (and many features updates after that), but I have not had a "clean" Windows since about 2012 on my main computer. Heck I've even changed Motherboard, CPU and memory at one time (from different chipsets) and I havent had to reinstall Windows.

Mostly because I'm lazy and I dont think a 45 seconds boot is THAT long

[politux]

Windows 10 build 18305 comes with a sandbox, ain't that a cool feature?

Yeah and it comes with free malware and spyware to track everything you do and send it to Redmond.

[dueda]

Up until about 2012 I would reinstall Windows every 8 or 9 months or so, because computers tend to get much slower before that point. From 2012, I haven't "reinstalled" perse...

Mostly because I'm lazy and I dont think a 45 seconds boot is THAT long

You imply not only the boot but general performance; I suppose your main computer is used for interactive tasks (such as browsing or gamming) that aren't affected by severe slow-downs. But 45" boot would be solved with hibernation plus a weekly cleaning / cold boot.

Windows 10 build 18305 comes with a sandbox, ain't that a cool feature?

Yeah and it comes with free malware and spyware to track everything you do and send it to Redmond.

I suppose Redmond's guile could think of "smart" uses for a sandbox and microcode / managed code. I don't trust their hidden agenda doctrine.