Asus ux31e no longer shares with HomeGroup

[luminarius]

After installing elementary test service on laptop ux31e (win7 family) homegroup member (sc-pc) removed it with permutations of
regedit HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\xsrv failure=>sys\msizap T srv.exe
On next connexion to desktop HomeGroup server (generic i7-2600k win7 pro=ad-pc) started recieving errors where sc-pc was visible
but even said itself during win7 diagnostics (all kinds) that it "wasn't responding" "wasn't sharing" etc.
Errors listed below (excuse my French!!) :
eventvwr.msc = eventlogs showing lanmanserver error 7001
Le service Explorateur d’ordinateurs dépend du service Serveur qui n’a pas pu démarrer en raison de l’erreur :
Le service de dépendance n’existe pas ou a été marqué pour suppression.
win7 net start LanmanServer
error="1075"
"Could not start the Net Logon service on Local Computer. Error 1075: The dependency service does not exist or has been marked for deletion."
http://markswinkels.nl/tag/error-1075/
Regedit.exe
HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/Netlogon/
https://technet.microsoft.com/en-us/library/cc962287.aspx
to get list of running services :
tasklist /SVC > tasklist_svc.lst
output :
Nom de l'image PID Services
========================= ======== ============================================
System Idle Process 0 N/A
System 4 N/A
smss.exe 308 N/A
csrss.exe 452 N/A
wininit.exe 608 N/A
csrss.exe 620 N/A
services.exe 656 N/A
lsass.exe 680 KeyIso, SamSs
lsm.exe 688 N/A
svchost.exe 780 DcomLaunch, PlugPlay, Power
ASCService.exe 864 AdvancedSystemCareService10
IMFsrv.exe 928 IMFservice
svchost.exe 340 RpcEptMapper, RpcSs
svchost.exe 520 AudioSrv, Dhcp, eventlog,
HomeGroupProvider, lmhosts, wscsvc
svchost.exe 388 AudioEndpointBuilder, hidserv, Netman,
PcaSvc, UxSms, Wlansvc
winlogon.exe 684 N/A
svchost.exe 604 AeLookupSvc, Appinfo, BITS, EapHost,
IKEEXT, ProfSvc, Schedule, SENS,
ShellHWDetection, Winmgmt, wuauserv
svchost.exe 1140 gpsvc
svchost.exe 1188 EventSystem, fdPHost, FontCache, netprofm,
nsi, WdiServiceHost
svchost.exe 1260 CryptSvc, Dnscache, LanmanWorkstation,
NlaSvc
spoolsv.exe 1480 Spooler
svchost.exe 1532 BFE, DPS, MpsSvc
InsOnSrv.exe 1672 ASUS InstantOn
svchost.exe 1700 DiagTrack
svchost.exe 1868 stisvc
taskhost.exe 1920 N/A
InsOnWMI.exe 1928 N/A
taskeng.exe 2020 N/A
dwm.exe 2060 N/A
explorer.exe 2100 N/A
ATKOSD2.exe 2116 N/A
taskeng.exe 2132 N/A
BatteryLife.exe 2172 N/A
Monitor.exe 2184 N/A
ACMON.exe 2220 N/A
ADDEL.exe 2244 N/A
USBChargerPlus.exe 2260 N/A
svchost.exe 2740 PolicyAgent
svchost.exe 2792 bthserv
FspUip.exe 2508 N/A
RAVCpl64.exe 2388 N/A
hkcmd.exe 148 N/A
DMedia.exe 2720 N/A
AsScrPro.exe 1112 N/A
wcourier.exe 3032 N/A
FLxHCIm.exe 3096 N/A
HControlUser.exe 3136 N/A
jusched.exe 3296 N/A
ACEngSvr.exe 3548 N/A
SearchIndexer.exe 3876 WSearch
wmpnetwk.exe 3984 WMPNetworkSvc
ASCTray.exe 1400 N/A
IMF.exe 3120 N/A
svchost.exe 3408 FDResPub, SSDPSRV, upnphost
IMFTips.exe 3076 N/A
LiveUpdate.exe 3776 N/A
PresentationFontCache.exe 1616 FontCache3.0.0.0
UninstallMonitor.exe 4164 N/A
svchost.exe 5048 WinDefend
wuauclt.exe 1120 N/A
jucheck.exe 1652 N/A
dllhost.exe 760 N/A
notepad.exe 4360 N/A
mmc.exe 4440 N/A
chrome.exe 3108 N/A
chrome.exe 4688 N/A
chrome.exe 4200 N/A
chrome.exe 4436 N/A
chrome.exe 2620 N/A
chrome.exe 5012 N/A
chrome.exe 4928 N/A
chrome.exe 2320 N/A
chrome.exe 4416 N/A
cmd.exe 1744 N/A
conhost.exe 4344 N/A
chrome.exe 3908 N/A
chrome.exe 2612 N/A
chrome.exe 4392 N/A
chrome.exe 1420 N/A
chrome.exe 1596 N/A
Uedit32.exe 5492 N/A
chrome.exe 1900 N/A
regedit.exe 3564 N/A
taskmgr.exe 6076 N/A
chrome.exe 4472 N/A
SearchProtocolHost.exe 5520 N/A
SearchFilterHost.exe 6044 N/A
WmiPrvSE.exe 5168 N/A
tasklist.exe 5916 N/A

Can anyone at least tell me what services I need to get back running
in order to reconnect sharing of sc-pc on HomeGroup network?