there have been a few posting about problems after performing a system memory format. so i decided to try it and see what happens. before plunging into this i was sure to make a recent nand backup using bootmii/boot2 and saving a copy to my computer. could have probably tested this using sneek? but i dont use sneek, so its not an option i have available. go into wii settings and select Format Wii System Memory. added channels and save data will be erased. BLAH BLAH BLAH. select format. if you use wii shop channel, BLAH BLAH BLAH, select format. remember, all of your current data will be lost. BLAH BLAH BLAH. select format. the wii system memory has been formatted. the wii console will shut down. select ok. the wii powers down, pressing the power button on the the wii remote turns it back on. to my surprise its a black screen WTF oh wait, its only been 15 secs and now i see press (A) to continue screen. not the usual screen but the first one when a wii is originally setup. press (A) and select language english, sensor bar above tv, date 2/8/11, time 23:20, widescreen, be sure to set your tv display BLAH BLAH BLAH. console nickname wii, country usa, parental controls no, your wii has screen burn in reduction BLAH BLAH BLAH ok. finally back at the darkwii theme and smoky health screen, press (A). wait WTF happened to all my channels????? did i not read that the format will remove my channels???? where is HBC and how am i ever going to play my games without the precious wiiflow channel??? insert sd card to attempt bannerbomb v1. what do you know? hackmii loads as expected and hbc is installed using IOS58. first check is anytitle deleter. all expected IOS are still installed, also as expected all other content is removed except shop, mii channel, region select and EULA. next stop, syscheck. looks normal. [for my setup] Warning: Spoilers inside! sysCheck v2.1.0b5 by Double_A ...runs on IOS58 (rev 6175). Region: NTSC-U System Menu 4.1U (v449) Homebrew Channel 1.0.8 running on IOS58 Hollywood v0x11 Console ID: 59350547 Boot2 v4 Found 17 titles. Found 11 IOS on this console. 0 of them are stub. IOS31 (rev 3608): No Patches IOS35 (rev 3608): No Patches IOS36 (rev 65535): Trucha Bug, ES Identify, NAND Access IOS56 (rev 5662): No Patches IOS58 (rev 6175): No Patches IOS60 (rev 6174): Trucha Bug, NAND Access IOS236 (rev 65535): Trucha Bug, ES Identify, NAND Access IOS238 (rev 21): Trucha Bug, ES Identify, NAND Access IOS249 (rev 21): Trucha Bug, NAND Access, USB 2.0 IOS250 (rev 65535): Trucha Bug, NAND Access, USB 2.0 IOS254 (rev 65281): BootMii Report generated on 2011/02/08. now to attempt reinstalling wiiflow channel and running games. loaded mmm using cIOS236. select wad manager and installed wiiflow starnight forwarder, exit mmm, exit hbc. start the wiiflow channel and everything loads fine, even games. access shop channel. DUH, i need to setup my internet connection, hold on. no, i dont wont to perform an update. try shop channel again, but i havent agreed to the EULA, i accept. works fine, even has my wii points and downloaded titles. sweet. downloaded netflix channel and even connected without a problem. what about priiloader? hold reset and back into priiloader, but all my settings and hacks are gone. change the settings and enable a few hacks. check move disc channel and its working. in conclusion, i dont see what all the fuss is about. all the Format Wii System Memory did was exactly what it said it would do, remove channels, save data and settings. now to run restoremii. my son would be upset if he found out i erased his game saves. LOL backupmii says "i haz success". rant over. have a nice day.