boot

boot keys

to be updated. will vary based on age and bios type
Acer/Gateway
Setup F2
Boot F12
Recovery Alt + F10
BIOS Recovery Fn + Esc
Asus
Setup Delete
Recovery Use tool
Dell
Setup F2
Boot F12
HP
Setup F10
Boot F9
Options Esc
Network F12
Lenovo/IBM
Setup F1
Boot F12
Options Blue "ThinkVantage" button
any key to halt menu timer
Samsung
Boot F2
Recovery F4
Sony
Setup Hold F2
Toshiba
Setup F2
Boot F12
Windows 8/8.1 Machines
Options/boot menu
UEFI settings access
Search "Advanced Startup"
more info on eightforums

isos and tools

Hiren's Boot DVD 15.2 Restored Edition 1.1 magnet:?xt=urn:btih:6509a1a3833d697f2f16bd40491e5178df59e7dc
mega.co.nz/#!0xExzIpb!ZBa6z3DDkIAYYlMn0F_PgR-mh1lg7dhND-lGpsTltrw
Hiren's Boot CD 15.2 www.hirensbootcd.org/download/
Hiren's Boot CD 14.1 www.hirensbootcd.org/hbcd-v141/
Hiren's Boot CD 13.2 www.hirensbootcd.org/hbcd-v132/
Hiren's Boot CD 12.0 www.hirensbootcd.org/hbcd-v120/
Hiren's Boot CD 11.1 www.hirensbootcd.org/hbcd-v111/
Hiren's Boot CD 10.6 www.hirensbootcd.org/hbcd-v106/
Acronis 2015 dl2.acronis.com/s/AcronisTrueImage2015_en-US.iso
Acronis 2014 dl2.acronis.com/s/AcronisTrueImage2014_en-US.iso
Acronis 2013 dl2.acronis.com/s/ATIH2013_en-US.iso
Acronis 2012 dl2.acronis.com/s/ATIH2012_en-US.iso
Parted Magic 2013 mega.co.nz/#!Y50UURRb!og8yYg7J9eF45cCU6oVr3o9gFKDMy5oL24QByOn_APk
Parted Magic 2012 mega.co.nz/#!xltimB4B!jCZ-FuDzEvpTiNZGF8mG_gI20PO_XgSgNnf8c4-oLSY
Plop Boot Manager download.plop.at/files/bootmngr/plpbt-5.0.15.zip
Kaspersky Rescue Disk support.kaspersky.com/4162
ntpword 140201 Password Reset pogostick.net/~pnh/ntpasswd/cd140201.zip
pogostick.net/~pnh/ntpasswd/usb140201.zip
Seatools for DOS seagate.com/files/www-content/support-content/downloads/seatools/_shared/downloads/SeaToolsDOS223ALL.ISO
memtest86+ memtest.org/download/5.01/memtest86+-5.01.iso.zip
ESET SysRescue download.eset.com/special/sysrescue-creator/eset_sysrescue_live_creator_enu.exe
download.eset.com/com/eset/tools/recovery/rescue_cd/latest/eset-sysrescue.1.0.9.0.enu.iso

more info and sources

Hiren's Boot CD hiren.info/pages/bootcd www.hirensbootcd.org/category/all-versions/ forums.mydigitallife.info/threads/54558?p=912659 Acronis True Image acronis.com/en-us/personal/pc-backup/ forums.mydigitallife.info/threads/56395/page6?p=948562 Parted Magic partedmagic.com mrsebe.bplaced.net/blog/wordpress/?p=80/#mirrors please delete version 2013_08_01 as it contains critical bugs Windows NT/2k/XP/Vista Change Password "ntpasswd" pogostick.net/~pnh/ntpasswd/ Seagate Seatools seagate.com/ca/en/support/downloads/item/seatools-dos-master/ Memtest86+ memtest.org Plop plop.at/en/bootmanager/download.html ESET SysRescue www.eset.com/int/support/sysrescue/#download support.eset.com/kb3509/?&page=content&id=SOLN3509