retro computer disk maintenance, WorkFromHome SchoolFromHome CoronaVirus setup

Some of the old laptops getting a bit of attention now whole family is Work/School from home.

Fionn has a good work laptop and setup recently new monitor with good resolution on table in Mezzanine. Daire has own laptop and table in his room. Maeve started using phone, Fionn got old but not too old windows laptop and set it up for her. Kate using older Dell laptop in "library". James using old Dell linux laptop in sitting room, now moved to standy up station in kitchen thanks to Fionn. And monitor Fionn also.

James old laptop was 2G now 4G memory taken from not working other laptop.

Kate's laptop windows 7 Dell Latitude, 8G RAM. Disk 300G but 270G used. yeow.
Defrag stuck 5% says it last ran July 2017.
This laptop fondly remembered as the one where(long long ago) the login for the main user account and the Administrator account were corrupted somehow so a system rescue CD and ntfs account password editing tool was used to recover Administrator access.
Running ok but maybe some things a bit slow . . .

https://www.dell.com/support/article/en-ie/sln32294/how-do-i-run-the-system-file-checker-in-microsoft-windows?lang=en
https://www.computerhope.com/issues/ch001118.htm

C:\Users\Administrator>sfc /scannow
Beginning system scan.  This process will take some time.
Beginning verification phase of system scan.Verification 100% complete.
Windows Resource Protection found corrupt files and successfully repairedthem. Details are included in the CBS.Log windir\Logs\CBS\CBS.log. Forexample C:\Windows\Logs\CBS\CBS.log
C:\Users\Administrator>chkntfsYou must specify at least one drive name.
C:\Users\Administrator>chkntfs c:The type of the file system is NTFS.C: is not dirty.

After this disk defrag still seemed to get stuck at 5% . . stop operation . .

So . . Disk Cleanup running . . taking a while . . . system error reports, . .

After a while it reports it can clean . . . among other smaller items: 

 Temporary Internet files 22M

 Debug Dump files 602M  ***

 Recycle Bin 1.19G ***

 System Error memory dump files 610M ***

 Windows Update Cleanup 25G **************

 Total gain: 27G

cygwin du Disk Usage, what is using the 270G ?

Administrator@FOURIER ~
$ du -h --max-depth=1  /cygdrive/c
4.0G    /cygdrive/c/$Recycle.Bin
397M    /cygdrive/c/2015_FourierBackup
39M     /cygdrive/c/AmazingSave
4.4M    /cygdrive/c/c4c1b974a7312f42c171249de6
8.0K    /cygdrive/c/certs
38M     /cygdrive/c/Config.Msi
1.5G    /cygdrive/c/cygwin
3.2G    /cygdrive/c/cygwin64
187M    /cygdrive/c/dell
0       /cygdrive/c/found.000
32K     /cygdrive/c/found.001
4.0K    /cygdrive/c/found.002
82K     /cygdrive/c/found.003
53K     /cygdrive/c/found.004
144K    /cygdrive/c/found.005
4.0K    /cygdrive/c/Intel
6.7M    /cygdrive/c/MININT
1.2G    /cygdrive/c/MSOCache
0       /cygdrive/c/PerfLogs
1.4G    /cygdrive/c/pio
4.9G    /cygdrive/c/Program Files
5.7G    /cygdrive/c/Program Files (x86)
3.1G    /cygdrive/c/ProgramData
5.1M    /cygdrive/c/r52264en
165M    /cygdrive/c/Recovery
13G     /cygdrive/c/System Volume Information
2.1M    /cygdrive/c/temp
34G     /cygdrive/c/tmp  

76G    /cygdrive/c/Users

. . . . .  

109G    /cygdrive/c/Windows
802M    /cygdrive/c/ZoidbergBackup
270G    /cygdrive/c

 $ du -h --max-depth=3  /cygdrive/c |sort -h

https://www.pluralsight.com/blog/tutorials/windows-7-defrag
First analyse then defrag:
 $ defrag c? -a -v
 $ defrag c: -u

https://www.howtogeek.com/howto/windows-vista/guide-to-using-check-disk-in-windows-vista/
 $ chkdsk /?
 $ chkdsk /r
"Running chkdsk /r gives you the most thorough scan you can perform"

https://neosmart.net/wiki/chkdsk/
https://support.microsoft.com/en-us/help/17421/windows-free-up-drive-space

https://etc.usf.edu/techease/win/hardware/how-do-i-scan-my-hard-drive-for-errors/