Windows Update and lost my last savegame

I updated Windows 10 to 1809 and my PC starts to run bad, lags, mouse pointer loading every 2 secs, ecc… I decided to roll back to 18.03 and than I lost about 12 Milions Cr. and about 150 cars from Auction House. :\

List of the cars I lost:

1x ALFA ROMEO P3 (1934)
1x ALFA ROMEO GIULIA QUADRIFOGLIO FORZA EDITION (2016)
2x ARIEL ATOM 500 V8 (2013)
2x ASTON MARTIN DB11 PREORDER CAR (2017)
1x ASTON MARTIN VULCAN FORZA EDITION (2016)
6x AUDI TT RS COUPE (2010)
3x AUSTIN FX4 TAXI (1964)
1x BMW M3 (2005)
3x CADILLAC XTS LIMOUSINE (2013)
2x CATERHAM SUPERLIGHT R500 FORZA EDITION (2013)
1x CHEVROLET MONTE CARLO SUPER SPORT (1988)
1x CHEVROLET CAMARO Z28 (1979)
1x CHEVROLET NOVA SUPER SPORT 396 FORZA EDITION (1969)
3x DODGE CHALLENGER SRT DEMON (2018)
2x FORD MUSTANG BOSS 302 (1969)
3x FORD CROWN VICTORIA POLICE INTERCEPTOR (2010)
13x FORD XB FALCON GT (1973)
1x FORD FALCON XA GT-HO FORZA EDITION (1972)
1x FORD F-150 SVT RAPTOR (2011)
5x HONDA CIVIC TYPE R (2004)
3x HONDA CIVIC TYPE R (2018)
1x HONDA CRX MUGEN (1984)
3x HOONIGAN GYMKHANA 10 FORD HOONICORN MUSTANG (1965)
1x HOONIGAN GYMKHANA 10 FORD FIESTA ST (2017)
1x HOONIGAN GYMKHANA 10 FORD FOCUS RS RX (2016)
4x HOT WHEELS BONE SHAKER (2011)
9x HOT WHEELS TWIN MILL (1969)
3x HUMMER H1 ALPHA (2006)
3x JEEP GRAND CHEROKEE TRACKHAWK (2018)
3x JEEP GRAND CHEROKEE SRT (2014)
2x KTM X-BOW GT4
2x LAMBORGHINI AVENTADOR LP750-4 SV (2016)
3x LAMBORGHINI AVENTADOR LP700-4 FORZA EDITION (2012)
6x LANCIA DELTA HF INTEGRALE EVO (1992)
9x MCLAREN 720S COUPE PREORDER CAR (2018)
1x MERCEDES-BENZ E 63 AMG (2013)
2x MINI JOHN COOPER WORKS GP (2012)
8x NISSAN SKYLINE GT-R V-SPEC II (2002)
1x NISSAN GT-R LM FORZA EDITION (1995)
1x NOBLE M600 (2010)
1x PEUGEOT 205 TURBO 16 FORZA EDITION (1984)
5x PONTIAC FIREBIRD TRANS AM SD-455 (1973)
2x PORSCHE CAYENNE TURBO (2018)
2x PORSCHE 911 GT3 RS (2019)
2x RAM 2500 POWER WAGON (2017)
1x RENAULT CLIO WILLIAMS (1993)
3x SUBARU IMPREZA WRX STI (2004)
1x ULTIMA EVOLUTION COUPE 1020 (2015)
6x VOLKSWAGEN GOLF R (2010)